Top scandals and controversies of each US president

Three major scandals have surfaced over the past few weeks in Washington, escalating into a perfect storm that involves money, media and security.

With the IRS targeting tea party tax-exempt groups, the Department of Justice seizing Associated Press records and the resurfacing of concerns about the handling of the attack on the American consulate in Benghazi, Libya, many are wondering what the Obama administration's role is in all of these affairs.

But scandal and controversy are nothing new to Washington — as long as there have been presidents, there has been controversy. Here is a look back at the most controversial events of each United States president.